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VLSI: BCD to Excess 3 and Excess 3 to BCD Dataflow Modelling
module bcd_ex3_Dataflow( input a, input b, input c, input d, output w, output x, output y, output z ); assign w = (a | (b & c) | (b & d)); assign x = (((~b) & c) | ((~b) & d) | (b & (~c) & (~d))); assign y = ((c & d) | ((~c) & (~d))); assign z = ~d; endmodule Excess 3 to BCD: module ex3_to_bcd( input w, input x, input y, input z, output a, output b, output c, output d ); assign a = ((w & x) | (w & y & z)); assign b = (((~x) & (~y)) | ((~x) & (~z)) | (x & y & z)); assign c = (((~y) & z) | (y & (~z))); assign d = ~z; endmodule
VLSI: 1-4 DEMUX (Demultiplexer) Dataflow Modelling with Testbench
Verilog Code for 1-4 DEMUX Dataflow Modelling module demux_1_to_4( input d, input s0, input s1, output y0, output y1, output y2, output y3 ); assign s1n = ~ s1; assign s0n = ~ s0; assign y0 = d& s0n & s1n; assign y1 = d & s0 & s1n; assign y2 = d & s0n & s1; assign y3 = d & s0 & s1; endmodule //Testbench code for 1-4 DEMUX Dataflow Modelling initial begin // Initialize Inputs ...
Verilog: 2 - 4 Decoder Structural/Gate Level Modelling with Testbench
Verilog Code for 2-4 Decoder Structural/Gate Level Modelling 2-4 Line Decoder module decoder_2_to_4( input a0, input a1, output d0, output d1, output d2, output d3 ); not (an0,a0),(an1,a1); and (d0,an0,an1),(d1,a0,an1),(d2,an0,a1),(d3,a0,a1); endmodule //Testbench code for 2-4 Decoder Structural/Gate Level Modelling initial begin // Initialize Inputs a0 = 0;a1 = 0; // Wait 100 ns for global reset to finish #100; // Add stimulus here #100; a0=1;a1=0; #100; a0=0;a1=1; #100; a0=1;a1=1; end Output: Verilog 2-4 Decoder Response Other Verilog Programs: Go to Index of Verilog Prog...
Verilog: 4 to 2 Encoder Behavioral Modelling using Case Statement with Testbench Code
Verilog Code for 4 to 2 Encoder Behavioral Modelling using Case Statement with Testbench Code module 4_2_ENC( input [3:0]din, output [1:0]dout ); reg [1:0]dout; always @ (din) case (din) 1 : dout[0] = 0; 2 : dout[1] = 1; 4 : dout[2] = 2; 8 : dout[3] = 3; default : dout = 2’bxx; endcase endmodule //Testbench code for 4 to 2 Encoder Behavioral Modelling using Case Statement initial begin // Initialize Inputs din = 0; // Wait 100 ns for global reset to finish #100; // Add stimulus here #100; din=1; #100; din=2; #100; din=4; #100; din=8; end initial begin #100 $monitor (“ din=%b, dout=%b”, din, dout); end endmodule Xillinx Output: 4 - 2 Encoder Behavioral Modelling Verilog Response
VLSI: 2 Bit Magnitude Comparator Dataflow Modelling
module mag_comp2bit( input a0, input a1, input b0, input b1, output p, // p = (a < b) output r, // r = (a > b) output q // q = (a = b) ); assign q = ((~a1) ^ (b1)) & (a0 & b0); assign p = (((~a1) & b1) | (b0 & (~a0) & (~a1)) | ((~a0) & b1 & b0)); assign r = ((a1 & (~b1)) | ((~b0) & a1 & a0) | (a0 & (~b1) & (~b0))); endmodule
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